Inspired by this comment and a need to burn off some steam during dead time in my day, I figured i'd spin off and ask what everyone else likes writing with.

I have atrocious handwriting, but have found i'm more likely to take notes if I actually enjoy what i'm writing with, and then by extension I started looking at smaller pens so I wouldn't mind carrying them on me at all times. After diving down the rabbit hole a bit over the years I've got-

Fountain Pens:

Lamy Vista-
The first one I dived into. Everyone recommended the safari, and the vista looked cooler, so I went with that. It eventually got broken, but I thought it was a great starting point. I haven't gotten any more though simply because I don't love that they use a different cartridge than the vast majority of pens, and didn't want to bother with converters.

TWSBI Eco-
My first piston fountain pen and still one of the best. I love the look, I love how it writes, I love that it's cheap so if I do screwup (like say put it through the wash 4 times over the years.....) it's not a bank breaking expense.

Kaweco liliput in fireblue -
This was my treat for not losing/breaking the Eco for a few years, and because i've got a sling I carry with me and wanted something nice to write with that fit with a notebook (there's a wallet I use for that). Much more expensive than a normal liliput but it's gorgeous and I love it.
NOTE: I linked to the nibsmith because I do think it's the only spot you should buy this pen from. They let you choose some extra options for the nib at the bottom, and for no extra charge, they'll do a "tune & smooth" pass which I've noticed helps with this pens one flaw of sometimes struggling to get it started. Not the end of the world if you're buying it for the normal $55 price and need something small, but extra unacceptable at the price point of the fancier versions.

Other Pens:

Bullet Space Pen -
I've got one in black and one in brass. They fit in the same compartment as the liliput for when I don't want to be using a fancier pen, and of course write very well, in basically any condition, and are extremely cheap for the hobby at $36.

Contrail pocket pen-
Silly expensive, but this one clips onto my wallet, which also has a notebook in it, and thus has become the pen I use the most. Writes well (and since it's a ball point you can easily change the cartridge to whatever you want), looks nice, and is quick to get open so I can take spur of the moment notes. I can use the Liliput/Bullet as well with my setup, but the liliput's screw cap is a little slow/unwieldy for those scenarios, and the bullet clip kept falling off in my pocket.

Stuff I've had my eye on:

Honestly i've found a lot of fountain/fancy pens are quite over the top/large, when I really prefer a more sleek/small look. Still one of these days i'll probably get a Vanishing point fountain pen, because I do think that's really cool, but I haven't seen too much else that's really caught my eye.

That's it for my modest collection. I'm curious to see what others have.

Curious to see and talk with others about using AI to dynamically write personal novels as a hobby, a form of choose-your-own-adventure where you can offload part of the creativity and majority of the grunt-work involved with writing onto the AI.

I started around half a year ago with Novel AI, yet when my stories would reach around the 15,000 word count the context management required due to the 2k token limit caused for a a net negative experience. A few months ago I experimented with ChatGPT at its 4k token limit, but the major cons of the limited ability to edit the content combined with the "always happy" bias hard-wired in made it short lived. That is until I discovered the variant site, Open AI Playground in Chat mode. It isn't free, but the first $5 are free as a trial. (And technically they mention it isn't for entertainment purposes and to use it responsibly)

Using the Playground I've written a 41,000, 23,000, and 21,000 (in-progress, plan is to hit 6 digits) word count personal stories/novels/adventures thus far. Using the co-DM system of bouncing with the AI to suggest creative alternatives (e.g. "List 10 twists that could occur next in the story"), adding creative embellishments (e.g. "Describe the city in detail, using epic high-fantasy influence"), and many other tips it's kept me hooked on some wild adventures across my favorite genre(s), tailored to me.

Edit:
OpenAI just released a GPT 3.5 Turbo 16k model for the Playground, lol. Absolutely obliterating NovelAI's 2k and the previous 4k limits. You could fit a significant portion of an entire novel and it'd take into account every sentence said. It'd probably take a pretty penny to use even half the context window, but could be useful for more critical moments of my novels.